518162081 has 2 divisors, whose sum is σ = 518162082. Its totient is φ = 518162080.

The previous prime is 518162077. The next prime is 518162107. The reversal of 518162081 is 180261815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 457960000 + 60202081 = 21400^2 + 7759^2 .

It is a cyclic number.

It is not a de Polignac number, because 518162081 - 2² = 518162077 is a prime.

It is a super-2 number, since 2×518162081² = 536983884372501122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (518162011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259081040 + 259081041.

It is an arithmetic number, because the mean of its divisors is an integer number (259081041).

Almost surely, 2^518162081 is an apocalyptic number.

It is an amenable number.

518162081 is a deficient number, since it is larger than the sum of its proper divisors (1).

518162081 is an equidigital number, since it uses as much as digits as its factorization.

518162081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 518162081 is about 22763.1737901374. The cubic root of 518162081 is about 803.1966271434.

The spelling of 518162081 in words is "five hundred eighteen million, one hundred sixty-two thousand, eighty-one".